I discovered NeonMob through a FaceBook advertisement.
It basically simulates the excitement of opening up a pack of trading cards.
I collected many trading cards when I was young. I even collected Bill Nye the Science Guy cards.
Personally I feel the greatest part of this website is making your own collection. A new way of expressing myself. Currently I've been working on the M.M.B. collection. It will include personal photos and art. Might be interesting if it attracts anyone. I've made over 70 cards so far. I won't publish it until it is well over 100. Interestingly you can control the rarity of the cards and even have variants. It is pretty cool. I even made some animated GIF. cards.
Here is snippet of my PhotoShop file..